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  <h2>python/网络编程/11-基于socketserver实现并发的socket套接字编程</h2>



  <p class="post-date">2020-10-17</p>
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    <section class="markdown-content"><h1 id="一、基于TCP协议"><a href="#一、基于TCP协议" class="headerlink" title="一、基于TCP协议"></a>一、基于TCP协议</h1><p>基于tcp的套接字，关键就是两个循环，一个链接循环，一个通信循环</p>
<p>socketserver模块中分两大类：server类（解决链接问题）和request类（解决通信问题）</p>
<h2 id="1-1-server类"><a href="#1-1-server类" class="headerlink" title="1.1 server类"></a>1.1 server类</h2><p>[<img src="https://tva1.sinaimg.cn/large/007S8ZIlly1gjrn33c777j30cj0k1jsh.jpg" alt="126-基于socketserver实现并发的socket-server类.png?x-oss-process=style/watermark"></p>
<h2 id="1-2-request类"><a href="#1-2-request类" class="headerlink" title="1.2 request类"></a>1.2 request类</h2><p>[<img src="https://tva1.sinaimg.cn/large/007S8ZIlly1gjrn3iozvoj309b09q74j.jpg" alt="126-基于socketserver实现并发的socket-request类.png?x-oss-process=style/watermark"></p>
<h2 id="1-3-继承关系"><a href="#1-3-继承关系" class="headerlink" title="1.3 继承关系"></a>1.3 继承关系</h2><p><img src="https://tva1.sinaimg.cn/large/007S8ZIlly1gjrn3wa5e8j30mo0d9mxv.jpg" alt="126-基于socketserver实现并发的socket-继承关系1.png?x-oss-process=style/watermark"></p>
<p><img src="https://tva1.sinaimg.cn/large/007S8ZIlly1gjrn4188ntj30lz0cjjs2.jpg" alt="126-基于socketserver实现并发的socket-继承关系2.png?x-oss-process=style/watermark"></p>
<p><img src="https://tva1.sinaimg.cn/large/007S8ZIlly1gjrn4bt7sgj30aw05nmx6.jpg" alt="126-基于socketserver实现并发的socket-继承关系3.png?x-oss-process=style/watermark"></p>
<h2 id="1-4-服务端"><a href="#1-4-服务端" class="headerlink" title="1.4 服务端"></a>1.4 服务端</h2><figure class="highlight python"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">import</span> socketserver</span><br><span class="line"></span><br><span class="line"><span class="class"><span class="keyword">class</span> <span class="title">MyHandler</span><span class="params">(socketserver.BaseRequestHandler)</span>:</span></span><br><span class="line">    <span class="function"><span class="keyword">def</span> <span class="title">handle</span><span class="params">(self)</span>:</span></span><br><span class="line">        <span class="comment"># 通信循环</span></span><br><span class="line">        <span class="keyword">while</span> <span class="literal">True</span>:</span><br><span class="line">            <span class="comment"># print(self.client_address)</span></span><br><span class="line">            <span class="comment"># print(self.request) #self.request=conn</span></span><br><span class="line"></span><br><span class="line">            <span class="keyword">try</span>:</span><br><span class="line">                data = self.request.recv(<span class="number">1024</span>)</span><br><span class="line">                <span class="keyword">if</span> len(data) == <span class="number">0</span>: <span class="keyword">break</span></span><br><span class="line">                self.request.send(data.upper())</span><br><span class="line">            <span class="keyword">except</span> ConnectionResetError:</span><br><span class="line">                <span class="keyword">break</span></span><br><span class="line"></span><br><span class="line"></span><br><span class="line"><span class="keyword">if</span> __name__ == <span class="string">'__main__'</span>:</span><br><span class="line">    s = socketserver.ThreadingTCPServer((<span class="string">'127.0.0.1'</span>, <span class="number">8080</span>), MyHandler, bind_and_activate=<span class="literal">True</span>)</span><br><span class="line"></span><br><span class="line">    s.serve_forever()  <span class="comment"># 代表连接循环</span></span><br><span class="line">    <span class="comment"># 循环建立连接，每建立一个连接就会启动一个线程（服务员）+调用Myhanlder类产生一个对象，调用该对象下的handle方法，专门与刚刚建立好的连接做通信循环</span></span><br></pre></td></tr></table></figure>

<h2 id="1-5-客户端"><a href="#1-5-客户端" class="headerlink" title="1.5 客户端"></a>1.5 客户端</h2><figure class="highlight python"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">import</span> socket</span><br><span class="line"></span><br><span class="line">phone = socket.socket(socket.AF_INET, socket.SOCK_STREAM)</span><br><span class="line">phone.connect((<span class="string">'127.0.0.1'</span>, <span class="number">8080</span>))  <span class="comment"># 指定服务端ip和端口</span></span><br><span class="line"></span><br><span class="line"><span class="keyword">while</span> <span class="literal">True</span>:</span><br><span class="line">    <span class="comment"># msg=input('&gt;&gt;: ').strip() #msg=''</span></span><br><span class="line">    msg = <span class="string">'client33333'</span>  <span class="comment"># msg=''</span></span><br><span class="line">    <span class="keyword">if</span> len(msg) == <span class="number">0</span>: <span class="keyword">continue</span></span><br><span class="line">    phone.send(msg.encode(<span class="string">'utf-8'</span>))</span><br><span class="line">    data = phone.recv(<span class="number">1024</span>)</span><br><span class="line">    print(data)</span><br><span class="line"></span><br><span class="line">phone.close()</span><br></pre></td></tr></table></figure>

<h2 id="1-6-客户端"><a href="#1-6-客户端" class="headerlink" title="1.6 客户端"></a>1.6 客户端</h2><figure class="highlight python"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">import</span> socket</span><br><span class="line"></span><br><span class="line">phone = socket.socket(socket.AF_INET, socket.SOCK_STREAM)</span><br><span class="line">phone.connect((<span class="string">'127.0.0.1'</span>, <span class="number">8080</span>))  <span class="comment"># 指定服务端ip和端口</span></span><br><span class="line"></span><br><span class="line"><span class="keyword">while</span> <span class="literal">True</span>:</span><br><span class="line">    <span class="comment"># msg=input('&gt;&gt;: ').strip() #msg=''</span></span><br><span class="line">    msg = <span class="string">'client11111'</span>  <span class="comment"># msg=''</span></span><br><span class="line">    <span class="keyword">if</span> len(msg) == <span class="number">0</span>: <span class="keyword">continue</span></span><br><span class="line">    phone.send(msg.encode(<span class="string">'utf-8'</span>))</span><br><span class="line">    data = phone.recv(<span class="number">1024</span>)</span><br><span class="line">    print(data)</span><br><span class="line"></span><br><span class="line">phone.close()</span><br></pre></td></tr></table></figure>

<h1 id="二、基于UDP协议"><a href="#二、基于UDP协议" class="headerlink" title="二、基于UDP协议"></a>二、基于UDP协议</h1><h2 id="2-1-服务端"><a href="#2-1-服务端" class="headerlink" title="2.1 服务端"></a>2.1 服务端</h2><figure class="highlight python"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">import</span> socketserver</span><br><span class="line"></span><br><span class="line"></span><br><span class="line"><span class="class"><span class="keyword">class</span> <span class="title">MyHandler</span><span class="params">(socketserver.BaseRequestHandler)</span>:</span></span><br><span class="line">    <span class="function"><span class="keyword">def</span> <span class="title">handle</span><span class="params">(self)</span>:</span></span><br><span class="line">        <span class="comment"># 通信循环</span></span><br><span class="line">        print(self.client_address)</span><br><span class="line">        print(self.request)</span><br><span class="line"></span><br><span class="line">        data = self.request[<span class="number">0</span>]</span><br><span class="line">        print(<span class="string">'客户消息'</span>, data)</span><br><span class="line">        self.request[<span class="number">1</span>].sendto(data.upper(), self.client_address)</span><br><span class="line"></span><br><span class="line"></span><br><span class="line"><span class="keyword">if</span> __name__ == <span class="string">'__main__'</span>:</span><br><span class="line">    s = socketserver.ThreadingUDPServer((<span class="string">'127.0.0.1'</span>, <span class="number">8080</span>), MyHandler)</span><br><span class="line">    s.serve_forever()</span><br></pre></td></tr></table></figure>

<h2 id="2-2-客户端"><a href="#2-2-客户端" class="headerlink" title="2.2 客户端"></a>2.2 客户端</h2><figure class="highlight python"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">import</span> socket</span><br><span class="line"></span><br><span class="line">client = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)  <span class="comment"># 数据报协议-》udp</span></span><br><span class="line"></span><br><span class="line"><span class="keyword">while</span> <span class="literal">True</span>:</span><br><span class="line">    <span class="comment"># msg=input('&gt;&gt;: ').strip() #msg=''</span></span><br><span class="line">    msg = <span class="string">'client1111'</span></span><br><span class="line">    client.sendto(msg.encode(<span class="string">'utf-8'</span>), (<span class="string">'127.0.0.1'</span>, <span class="number">8080</span>))</span><br><span class="line">    data, server_addr = client.recvfrom(<span class="number">1024</span>)</span><br><span class="line">    print(data)</span><br><span class="line"></span><br><span class="line">client.close()</span><br></pre></td></tr></table></figure>

<h2 id="2-3-客户端"><a href="#2-3-客户端" class="headerlink" title="2.3 客户端"></a>2.3 客户端</h2><figure class="highlight python"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">import</span> socket</span><br><span class="line"></span><br><span class="line">client = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)  <span class="comment"># 数据报协议-》udp</span></span><br><span class="line"></span><br><span class="line"><span class="keyword">while</span> <span class="literal">True</span>:</span><br><span class="line">    <span class="comment"># msg=input('&gt;&gt;: ').strip() #msg=''</span></span><br><span class="line">    msg = <span class="string">'client2222'</span></span><br><span class="line">    client.sendto(msg.encode(<span class="string">'utf-8'</span>), (<span class="string">'127.0.0.1'</span>, <span class="number">8080</span>))</span><br><span class="line">    data, server_addr = client.recvfrom(<span class="number">1024</span>)</span><br><span class="line">    print(data)</span><br><span class="line"></span><br><span class="line">client.close()</span><br></pre></td></tr></table></figure>

<h1 id="三、socketserver源码分析"><a href="#三、socketserver源码分析" class="headerlink" title="三、socketserver源码分析"></a>三、socketserver源码分析</h1><figure class="highlight python"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line">ftpserver=socketserver.ThreadingTCPServer((<span class="string">'127.0.0.1'</span>, <span class="number">8080</span>)，FtpServer)</span><br><span class="line">ftpserver.serve_forever()</span><br></pre></td></tr></table></figure>

<ul>
<li>查找属性的顺序：ThreadingTCPServer-&gt;ThreadingMixIn-&gt;TCPServer-&gt;BaseServer<ol>
<li>实例化得到ftpserver，先找类ThreadingTCPServer的<strong>init</strong>，在TCPServer中找到，进而执行server_bind，server_active</li>
<li>找ftpserver下的serve_forever，在BaseServer中找到，进而执行self._handle_request_noblock()，该方法同样是在BaseServer中</li>
<li>执行self._handle_request_noblock()进而执行request， client_address = self.get_request()（就是TCPServer中的self.socket.accept()），然后执行self.process_request(request， client_address)</li>
<li>在ThreadingMixIn中找到process_request，开启多线程应对并发，进而执行process_request_thread，执行self.finish_request(request， client_address)</li>
<li>上述四部分完成了链接循环，本部分开始进入处理通讯部分，在BaseServer中找到finish_request，触发我们自己定义的类的实例化，去找<strong>init</strong>方法，而我们自己定义的类没有该方法，则去它的父类也就是BaseRequestHandler中找….</li>
</ol>
</li>
</ul>
<h2 id="3-1-源码总结"><a href="#3-1-源码总结" class="headerlink" title="3.1 源码总结"></a>3.1 源码总结</h2><ul>
<li><p>基于tcp的socketserver我们自己定义的类中的</p>
<ul>
<li><p>self.server即套接字对象</p>
</li>
<li><p>self.request即一个链接</p>
</li>
<li><p>self.client_address即客户端地址</p>
</li>
</ul>
</li>
<li><p>基于udp的socketserver我们自己定义的类中的</p>
<ul>
<li><p>self.request是一个元组（第一个元素是客户端发来的数据，第二部分是服务端的udp套接字对象），如(b’adsf’, &lt;socket.socket fd=200, family=AddressFamily.AF_INET, type=SocketKind.SOCK_DGRAM, proto=0, laddr=(‘127.0.0.1’, 8080)&gt;)</p>
</li>
<li><p>self.client_address即客户端地址</p>
</li>
</ul>
</li>
</ul>
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      <ol class="toc-nav"><li class="toc-nav-item toc-nav-level-1"><a class="toc-nav-link" href="#一、基于TCP协议"><span class="toc-nav-text">一、基于TCP协议</span></a><ol class="toc-nav-child"><li class="toc-nav-item toc-nav-level-2"><a class="toc-nav-link" href="#1-1-server类"><span class="toc-nav-text">1.1 server类</span></a></li><li class="toc-nav-item toc-nav-level-2"><a class="toc-nav-link" href="#1-2-request类"><span class="toc-nav-text">1.2 request类</span></a></li><li class="toc-nav-item toc-nav-level-2"><a class="toc-nav-link" href="#1-3-继承关系"><span class="toc-nav-text">1.3 继承关系</span></a></li><li class="toc-nav-item toc-nav-level-2"><a class="toc-nav-link" href="#1-4-服务端"><span class="toc-nav-text">1.4 服务端</span></a></li><li class="toc-nav-item toc-nav-level-2"><a class="toc-nav-link" href="#1-5-客户端"><span class="toc-nav-text">1.5 客户端</span></a></li><li class="toc-nav-item toc-nav-level-2"><a class="toc-nav-link" href="#1-6-客户端"><span class="toc-nav-text">1.6 客户端</span></a></li></ol></li><li class="toc-nav-item toc-nav-level-1"><a class="toc-nav-link" href="#二、基于UDP协议"><span class="toc-nav-text">二、基于UDP协议</span></a><ol class="toc-nav-child"><li class="toc-nav-item toc-nav-level-2"><a class="toc-nav-link" href="#2-1-服务端"><span class="toc-nav-text">2.1 服务端</span></a></li><li class="toc-nav-item toc-nav-level-2"><a class="toc-nav-link" href="#2-2-客户端"><span class="toc-nav-text">2.2 客户端</span></a></li><li class="toc-nav-item toc-nav-level-2"><a class="toc-nav-link" href="#2-3-客户端"><span class="toc-nav-text">2.3 客户端</span></a></li></ol></li><li class="toc-nav-item toc-nav-level-1"><a class="toc-nav-link" href="#三、socketserver源码分析"><span class="toc-nav-text">三、socketserver源码分析</span></a><ol class="toc-nav-child"><li class="toc-nav-item toc-nav-level-2"><a class="toc-nav-link" href="#3-1-源码总结"><span class="toc-nav-text">3.1 源码总结</span></a></li></ol></li></ol>
    
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